CN107479448B - A kind of device and method for eliminating signal transmitting and receiving delay - Google Patents
A kind of device and method for eliminating signal transmitting and receiving delay Download PDFInfo
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- CN107479448B CN107479448B CN201710857819.3A CN201710857819A CN107479448B CN 107479448 B CN107479448 B CN 107479448B CN 201710857819 A CN201710857819 A CN 201710857819A CN 107479448 B CN107479448 B CN 107479448B
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- eeg signals
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The invention discloses a kind of device and methods of elimination signal transmitting and receiving delay, its device includes computer, defiber, signal processing unit, audio signal divider and earphone, computer is connect with earphone, audio signal divider respectively by defiber, and signal processing unit is connect with earphone, audio signal divider, computer respectively；Audio signal divider is connect by audio signal transmission conducting wire with signal processing unit, and EEG signals pass through EEG signals transfer wire input signal processing unit；It is divided into two-way through defiber in the audio signal that the audio interface of computer acquires, audio signal is by generating EEG signals after earphone input human brain all the way, and another way audio signal is after audio signal divider with EEG signals in same time entering signal processing unit.The present invention is label without using the stimulation time of origin of computer record, and the sound practical time generated is used to eliminate the delay of signal transmitting and receiving as label.
Description
Technical field
The invention belongs to Electrophysiology field, a kind of device and method for eliminating signal transmitting and receiving delay.
Background technique
In Evoked ptential and event related potential in use, issuing stimulus signal and acquiring prolonging between EEG signals
When be insoluble problem.No matter how quick hardware, software development be, and stimulus signal (i.e. voice signal) is issued to from computer
Always there is not eliminable delay between eeg signal acquisition recycling, according to different software and hardware structures, which can be with
From a few tens of milliseconds to several hundred milliseconds.And for the eeg signal acquisition of Evoked ptential and event related potential, this period
Delay may cause the global displacement of final signal, simultaneously because signal delay has certain randomness, for there is additive process
Signal acquisition, more may cause the case where signal is distorted.
Summary of the invention
For solve the prior art present in technical problem, the present invention provide it is a kind of elimination signal transmitting and receiving delay device and
Method, the stimulation time of origin without using computer record is label, and the sound practical time generated is used to eliminate as label
The delay of signal transmitting and receiving.
The present invention eliminates the device of signal transmitting and receiving delay, including computer, defiber, signal processing unit, audio signal
Divider and earphone, computer are connect with earphone, audio signal divider respectively by defiber, signal processing unit difference
It is connect with earphone, audio signal divider, computer；Audio signal divider passes through audio signal transmission conducting wire and signal processing
Unit connection, EEG signals pass through EEG signals transfer wire input signal processing unit；It is acquired in the audio interface of computer
Audio signal be divided into two-way through defiber, audio signal is by generating EEG signals, another way after earphone input human brain all the way
Audio signal is after audio signal divider with EEG signals in same time entering signal processing unit.
Preferably, the signal processing unit includes controller, USB interface, two-way operational amplifier, two-way analog-to-digital conversion
Device, operational amplifier, analog-digital converter, controller are sequentially connected, and controller is connect by USB interface with computer, a road transport
It calculates amplifier and receives EEG signals, another way operational amplifier receives signal.
The method that the present invention eliminates signal transmitting and receiving delay, it is including following based on the device of above-mentioned elimination signal transmitting and receiving delay
Step:
S1, computer audio interface acquisition output audio signal；
S2, audio signal collected are divided into two-way after defiber, and audio signal passes through after earphone input human brain all the way
Generate EEG signals, another way audio signal input audio signal divider；
S3, by the audio signal and EEG signals of audio signal divider in same time input signal processing unit；
S4, EEG signals and audio signal are recycled after signal processing unit processes by computer, computer to return
The audio signal of receipts come determine stimulus signal reach human ear time point.
Preferably, in step S3, treatment process of the signal processing unit to audio signal and EEG signals are as follows: first put
Big processing, then carries out analog-to-digital conversion for the signal of amplification, converts analog signals into digital signal, and last controller will be converted
Digital signal afterwards is transmitted to computer by USB interface.
Compared with the prior art, the invention has the following advantages and beneficial effects: physics latency issue can be solved perfectly,
It is separated different from the stimulus signal of the prior art with EEG signals amplification record, when due to occurring without using the stimulation of computer record
Between for label, and use the sound practical time generated as mark, it is more accurate than the prior art；Meanwhile it also avoiding piercing
Delay caused by energizing signal and EEG signals record respectively.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention；
Fig. 2 is the circuit diagram of signal processing unit；
Fig. 3 is EEG signals figure；
Fig. 4 is voice signal figure.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment
As shown in Figure 1, the device that the present invention eliminates signal transmitting and receiving delay includes computer 5, defiber 1, signal processing list
Member 3, audio signal divider 7 and earphone 6, computer 5 are connected with earphone 6, audio signal divider 7 respectively by defiber 1
It connects, signal processing unit 3 is connect with earphone, audio signal divider 7, computer 5 respectively.Audio signal divider passes through audio
Signal transmission wire 8 is connect with signal processing unit 3, and EEG signals are single by the processing of 2 input signal of EEG signals transfer wire
Member 3.
By the present invention in that with easy audio signal divider, stimulus signal (is handled through audio signal divider
Audio signal) it have passed through signal processing identical with EEG signals in signal processing unit, with EEG signals quilt jointly
Record, to eliminate the latency issue generated due to signal transmission.EEG signals and audio signal are through signal processing unit processes
It is recycled afterwards by computer, computer determines that stimulus signal (i.e. voice signal) reaches human ear to the audio signal of recycling
Time point, simultaneously because voice signal and EEG signals have passed through identical circuit (i.e. signal processing unit 3) after collection,
Its time shaft and EEG signals are in fully synchronized state, and identified time point does not have physics delay.
Such as Fig. 2, signal processing unit includes controller U5, USB interface, two-way operational amplifier (i.e. amplifier U2), two-way
Analog-digital converter, operational amplifier, analog-digital converter, controller are sequentially connected, and USB interface is connect with controller, all the way operation
Amplifier receives EEG signals, and another way operational amplifier receives voice signal.In signal processing unit, EEG signals enter
The amplifier U2 (CLC1200) of signal processing unit is amplified, and uV grades of signal is amplified to mV grades；Then by the brain electricity of amplification
Signal carries out analog-to-digital conversion U4 (ADS1258), converts analog signals into digital signal, last controller U5
(STM32F103RCT6) digital signal after conversion is transmitted to computer by USB interface U6 (FT245L), by the brain of acquisition
Electric signal is uploaded to host computer processing, finally acquires in computer end.As seen from the figure, the audio acquired in the audio interface of computer
Signal is divided into two-way through defiber, and audio signal is by generating EEG signals after earphone input human brain all the way；Another way audio letter
Number after audio signal divider, with EEG signals same time entering signal processing unit carries out operation amplifier, modulus turns
It changes, by identical treatment process, is finally got off by computer record.
There is notable difference on wave amplitude due to having voice signal to input and inputting waveform collected without voice signal,
Noise when having the wave amplitude of voice signal can be than no signal is higher by dozens to one hundred times, so the judgement that use uses below is patrolled
Specific location of the time that can be very good to search out the sending of each voice signal on EEG signals time shaft is collected, and in phase
It answers and is marked a little on the EEG signals figure of position, and be overlapped since mark point, as shown in Figure 3,4, such method
It can solve the caused label inaccuracy of delay, while also allowing stimulation mode to have and more freely changing space.The judgement is patrolled
Volume are as follows: assuming that acquiring the lead of audio, there are notable differences on wave amplitude for signal, then starting point is just in the signal now acquired
Labeled as 1, other points are labeled as 0, mark result as shown in Figure 4.In Fig. 3,4,21 be EEG signals waveform, and 22 be brain telecommunications
Number, 23 be sound signal waveform, and 24 be mark point, and 25 be superposition section, and 26 be sound signal data.
The present embodiment selects Matlab program that identification is marked to signal, and process is as follows: first by all data points
It is converted into positive number, then calculates average value, the number more than twice of average value takes 1, and the number less than twice of mean value is taken as 0.When one 1 number
According to preceding 500ms without 0 and back 100ms have more than 10 1 when, it is believed that this point for stimulation occur time, with record point
The data initial position average as EEG signals data investigation.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (7)
1. a kind of device for eliminating signal transmitting and receiving delay, which is characterized in that including computer, defiber, signal processing unit, sound
Frequency signal divider and earphone, computer are connect with earphone, audio signal divider respectively by defiber, signal processing list
Member is connect with earphone, audio signal divider, computer respectively；Audio signal divider passes through audio signal transmission conducting wire and letter
The connection of number processing unit, EEG signals pass through EEG signals transfer wire input signal processing unit；It is connect in the audio of computer
The audio signal of mouth acquisition is divided into two-way through defiber, and audio signal generates EEG signals after passing through earphone input human brain all the way,
Another way audio signal is after audio signal divider with EEG signals in same time entering signal processing unit；
The device for eliminating signal transmitting and receiving delay searches out the time of each voice signal sending using following decision logic
Specific location on EEG signals time shaft, and being marked a little on the EEG signals figure of corresponding position, and from mark point
Start to be overlapped: assuming that acquiring the lead of audio, there are notable differences on wave amplitude for signal, then rising in the signal of acquisition
Initial point is just labeled as 1, other points are labeled as 0；
The process that identification is marked to signal is as follows: all data points being converted into positive number first, then calculate average value, are more than
Twice of average value of number takes 1, and the number less than twice of average value is taken as 0；When a value be 1 data preceding 500ms without 0 and
When 100ms has more than the data that 10 values are 1 below, it is believed that the time that this point occurs for stimulation, with the data of record point
The initial position average as EEG signals data investigation.
2. the device according to claim 1 for eliminating signal transmitting and receiving delay, which is characterized in that the signal processing unit packet
Include controller, USB interface, two-way operational amplifier, two-way analog-digital converter, operational amplifier, analog-digital converter, controller according to
Secondary connection, controller are connect by USB interface with computer, and operational amplifier receives EEG signals all the way, and another way operation is put
Big device receives signal.
3. the device according to claim 2 for eliminating signal transmitting and receiving delay, which is characterized in that the operational amplifier uses
CLC1200。
4. the device according to claim 2 for eliminating signal transmitting and receiving delay, which is characterized in that the controller uses
STM32F103RCT6。
5. the device according to claim 2 for eliminating signal transmitting and receiving delay, which is characterized in that the analog-digital converter uses
ADS1258。
6. based on the method for eliminating signal transmitting and receiving delay of the device of elimination signal transmitting and receiving delay described in claim 1, feature
It is, comprising the following steps:
S1, computer audio interface acquisition output audio signal；
S2, audio signal collected are divided into two-way after defiber, and audio signal after earphone input human brain by generating all the way
EEG signals, another way audio signal input audio signal divider；
S3, by the audio signal and EEG signals of audio signal divider in same time input signal processing unit；
S4, EEG signals and audio signal are recycled after signal processing unit processes by computer, and computer is to recycling
Audio signal come determine stimulus signal reach human ear time point.
7. the method according to claim 6 for eliminating signal transmitting and receiving delay, which is characterized in that in step S3, signal processing
Treatment process of the unit to audio signal and EEG signals are as follows: first carry out enhanced processing, the signal of amplification is then subjected to modulus
Conversion, converts analog signals into digital signal, the digital signal after conversion is transmitted to meter by USB interface by last controller
Calculation machine.
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| CN107479448B true CN107479448B (en) | 2019-11-26 |
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| JP5219202B2 (en) * | 2008-10-02 | 2013-06-26 | 学校法人金沢工業大学 | Sound signal processing device, headphone device, and sound signal processing method |
| CN103494608A (en) * | 2013-10-16 | 2014-01-08 | 上海谱康电子科技有限公司 | Electroencephalogram detection signal synchronization circuit and method and electroencephalogram detection system |
| CN103716744A (en) * | 2012-10-08 | 2014-04-09 | 奥迪康有限公司 | Hearing device with brain-wave dependent audio processing |
| CN104257380A (en) * | 2014-10-22 | 2015-01-07 | 南京邮电大学 | Electroencephalograph collecting and processing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10345901B2 (en) * | 2015-04-30 | 2019-07-09 | Samsung Electronics Co., Ltd. | Sound outputting apparatus, electronic apparatus, and control method thereof |
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- 2017-09-21 CN CN201710857819.3A patent/CN107479448B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2753290Y (en) * | 2004-11-22 | 2006-01-25 | 中国科学院心理研究所 | Event-related potential instrument for collecting human neurobiological electric signal |
| JP5219202B2 (en) * | 2008-10-02 | 2013-06-26 | 学校法人金沢工業大学 | Sound signal processing device, headphone device, and sound signal processing method |
| CN101507606A (en) * | 2008-12-09 | 2009-08-19 | 上海理工大学 | Brain evoked potential collection method |
| CN103716744A (en) * | 2012-10-08 | 2014-04-09 | 奥迪康有限公司 | Hearing device with brain-wave dependent audio processing |
| CN103494608A (en) * | 2013-10-16 | 2014-01-08 | 上海谱康电子科技有限公司 | Electroencephalogram detection signal synchronization circuit and method and electroencephalogram detection system |
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